Food-waste reduction devices



1366- 1956 G. D. GEBHART FOOD-WASTE REDUCTION DEV ICES 2 Sheets-Sheet 1Filed March 8, 1952 INVENTOR. GEORGE D. GEBHAR'E BY 7 1956 G. D. GEBHARTFOOD-WASTE REDUCTION DEVICES 2 Sheets-Sheet 2 Filed March 8, 1952INVENTOR. GEORGE D. GEBHART United States Patent FOOD-WASTE REDUCTIONDEVICES 7 George D. Gebhart, Webster Groves, Mo. Application March 8,1952, Serial No. 275,481 8 Claims. Cl. 241-46) This invention relates toimprovements in food waste reduction devices, and more particularly toimproved garbage comminution means of a type adapted to reduce the sizeof waste food particles in a water slurry, as for disposal thereof bydrainage.

There are prevalently used many types of wet-garbage disposing machinesboth for domestic and commercial installations, and in other fields manyolder types of apparatus having been long known for the wet reduction ofsolid particles. However, most or all of such devices when utilized forthe reduction of liquid-entrained food waste particles, are subject tonumerous operational difiiculties and shortcomings, among which may benoted the tendency thereof to become jammed or clogged, and their lackof dependability to effect a. positive reduction in size of all types offood refuse to a degree that it will safely pass down the average drain;Other recognized shortcomings include a high first cost of suchapparatus, a high expense of replacement of wearing parts, excessivepower requirements and inordinately high installation expense, duelargely to the inherent nature of existing equipment, its greatweight,and the restricted space within which installations must usually bemade. The present invention accordingly has as its major object, animproved design overcoming each of the aforesaid disadvantages, andproviding a low-cost, light-weight, quickly installed garbage reducingunit which may be produced and sold considerablybelow present costs, andthe wearing parts of which may be readily replaced at low cost, and theworking parts of which are characterized by a lesser than prevalentpower requirement.

Yet another highly important object of the present invention is realizedin a food-refuse reduction apparatus which is so designed as positivelyto impel the reduced particles when in a slurry, through and beyond thezone of reduction thereof, and into a drain or other disposal conduit;

An additional object of high value, realized in the present invention,consists in an assembly for the purpose noted so designed that while it,may carry an electric motor as an operating part of the unit, such motoris readily separable from and as readily attachable to the bowl andreduction elements of the unit while the latter are'in place. Suchimprovementin overall design further enables production, storage andshipment of the motor entirely separate from the reduction elements ofthe unit, without i relatively heavy supporting "ring 12.

what similar channel 14 along its lower face and consistnecessitatingassembly thereof at any time prior to completion of an operativeinstallation. I

A still further object of the invention is realized ina food-wastereducer of wet type which may function throughjtwo-suc'cessive stages ofreduction, coupled with a positive propulsion of 'the liquid-entrainedwaste particles into a reducing zone, followed by a further positivepropulsion away from such zone and into a waste conduit.

An additional and highly valuableobjective of the present arrangementisrealized in an improved quick-acting supportfor a dependently mountedunit of the general ,class referred to, and of such nature that the unitmay be "ice temporarily but inoperatively supported in place whileenabling a full angular adjustment thereof, prior to final liquid-tightassembly with a sink or the like, and further such that the unit may beattached to and removed from tailed description of a certain preferredembodiment and' a minor modification thereof, particularly whenconsidered in connection with the accompanying drawing, in which: f

Fig. l is in part a vertical side elevational view, the major portion ofwhich is a section on a vertical median plane, of an assembly of thedevice when dependently supported from a receptacle thereabove, such asa sink;

Fig. 2 is a fragmentary horizontal sectional view taken on line 2--2 ofFig. 1, and showing certain features of a quick-detachable drivingconnection between the motor and the reducing elements of the assembly;

Fig. 3 is a horizontal view, with certain elements in section, as takenalong line 33 of Fig. 1;

Fig. 4 is a horizontal sectional view through the re'duc tion orshredding zone of the device, showing the operative relation of thefixed and movable reduction elements, this view being particularlylocated by line 4-4 of Fig. 1;

Fig. 5 is a fragmentary side elevational view of a portion of a combinedcentrifugal impeller and shredder element located exteriorly of theshredding zone of the device;

Fig. 6 is a vertical sectional view along a median vertical plane of aminor modification of the structure shown by Fig. 1, and

Fig. 7 is a fragmentary sectional view showing a suggested manner ofmounting the vanes and shearing elements of a rotor impeller operatinginternally of the reduction region of the bowl.

Referring now by characters of reference to the drawings, and first tothose features of the improvements which make for greater ease ofmounting and installation, as well as of improved assembly features ofthe whole device, there is shown by Fig. 1 a fragmentary portion of thebase element BE of a sink or the like, provided with a drain opening DOinto which is fitted a special tail piece gencrally indicated at 10.This latter is provided with external threads 11, these being threadedlyengaged by a The ring 12 is provided just inwardly of the periphery ofits upper face, with an, annular channel 13 of a U-shaped section,constituting, as will appear, a clamp seat, and with a someing of anannular seat for an upper bevelled edge of the body portion 15 of thebowl. A suitable ring gasket 16 may be interposed along channel 14 toenhance the. sealing effect between the upper margin of rnemberlS andthe ring 12.

There are provided for finally positioning the ring 12 against rotation,oncethe ring is suitably adjusted along the threaded tail piece 1%),ajplurality of jack screws 17 engaging tapped apertures therefor in thering 12, there being preferably a pair or more ofthe clamp screws 17.

Primary support of the reduction unit is derived through coaction withthe supporting ring 12, of a plurality, shown as two," of quick actingsupporting'clamps each generally indicated at 20. Since clamps of thisgeneral type, us-

ually known in and. available to the trade as draw-bolt clamps are perse well known, no extended description thereof is necessary, other thanbriefly to refer to an operating finger piece or handle thereofindicated at 21 pivoted at 22 to the member 15 or alternately to amounting base, the member 21 being likewise pivoted to a hook end leverarm 23, the upper or ho'ok end of which depthwise engages the channel13.

It will be apparent that the body 15, which is or may be of cylindricalform, serves directly to support the reduction elements, both movableand fixed, and hence constitutes a housing or casing portion of thereductio device,

Attached in depending relation to and located below the body of thedevice, is a vertical shaft motor M, including the usual rotor andwindings. The frame or housing or motor M is,in assembly, operativelyconnected to 21 depending skirt portion 24 through astcp joint 25. Theuppe'r end of motor shaft 26 is, as best appears from Fig. 2, of splinedformation, the splines of which are indicated at 27 and whieh slidablyinte'rfit, in positive driving relation, internal spline seats orformations of a hollow driving extension 30, the interfitted relation ofparts 26 and 30 being such that the motor may be coupled by an easyvertical sliding movement. Combined motor frame screws and supportingbolts 'are indicated at 31,

extending through the lower end bell of the housing of motor M thenceinto tapped bosses 32 carried within and formed as a part of thedepending structure 24 of the housing of the reduction device. i

It will be noted that the hollow drive extension 31) constitutes ajournal element for the rotary reducing and impelling elements latermore fully described. The element 30 is preferably of metal, and issupported in journalled relation within a special,preferably-nonmetallic journal sleeve 33, usually formed of a hard gradeof carbon, or of a self-lubricating material, or certain of the wearingplastic products.

It will have been noted that the upper annular face of member 33 ischaracterized by an annular ridge 34 against which bears in thrustjournalling relation while serving also as a liquid seal, a circularhead 35 of the member 30, the member 35 being securely attached to ahorizontal plate 36 by which, as will appear, the rotor and impellerelements of the device are carried.

With reference now to the shearing and displacement elements of therotor assembly,fthere are employed integrally with or separably attachedin radial relation to the base plate 36 of the rotor, a plurality ofvertical vane and shear elements 4'0, two of which are shown. Accordingto preference the vane elements 49 may be cushioned as through a rubberor rubber-like material so as to exhibit a certain flexibility underextreme stress, as

when theshearing margins of theseelements encounter extremely hardobjects. lf desired for ease of replacement, the lower margins of theblades or vanes'36 may bear a mortise relation as indicated at 41 (Fig.7), to the base plate 36 of the rotor. Thus if andfwlien any need arisesfor replacement of the elements 40, same may be done, when the rotorassembly is removed from the housing, by edgewise radial insertion ofreplacement blades "or vanes into the mortise seats therefor. If desiredfor greater economy, the elements 30, 3 5, 36 and the vanes 40 may beformed as a unit'of formed sheet or of cast metal. .7 v i I It is adistinct preference to utilize as later described, certain instruck orlanced portions in the stationary shearing portion of the assembly. '50.as to keep all parts of the outermost shearing edges of the vanes 45 inrelatively close overriding relation to'such instruck portions, theedges of the shredder vanes 4i? may be formed to exhibit a somewhatundulant margin as shown, or other conforming curvilinear shearingtedge.As will later be noted in discussion of operation of the device, theblades or vanes 40 serve dual distinct purposes, via, as shearing andshredding elements in coaction withstationary shearing edges laterdescribed, and at the same time providing a positive centrifugaldisplacement effect in moving the slurry (being the mixture of foodwaste particles and water), more or less directly and radially into theshredding zone.

A second shredding and shearing effect, which for convenience may bereferred to as a second stage of reduction, is provided by a bladed orvaned centrifugal wheel operating in close external adjacence to thestationary parts of the reduction structure. This centrifugal wheel isindicated generally at 42. Some detail thereof appears in Fig. 5, andcomprises a normally horizontal back plate 43 extended upwardly,peripherally and about at right angles to which are a plurality ofpitched vanes 44, (Figs. 1, 4 and 5). The uppermost ends of the severalblades or vanes 44 of the wheel 42 are by preference tied together as bya continuous ring structure .5 so as to maintain the pitch and spacingof the several blades 44. The inner edges of the blades 44 are generallyvertical and rectilinear, and in operation exhibit a second shearingaction, as will appear. To further this action, the inner edges of thevanes 44 may if desired, be slightly beveled. v

From the description thus far given of the rotary displacement andshredding elements, it will be seen that the rotor proper is comprisedof the relatively heavy base plate 36 together with the radial vanes andshear elements 40, the centrifugal displacement and shearing wheel 42which is fixedly attached as by welding or otherwise to the plate 36,together with the hollow drive extension 30 earlier described.

it will have appeared from the foregoing description of the rotaryassembly thatthe zone of actual reduction and positive displacement ofthe slurry, is defined in part by the rotor, but in further part by astationary bowlfor'tning structure carrying the stationary shearingelements. In Fig. 1 the bowl may be said to consist of the cylindricalhousing member 15 consisting of a cast or otherwise formed cylindricalstructure. The member 15 is attached 'as by screws 46 extending throughsuitable apertures in a flange 47, the latter supported by a generallycylindrical skirt structure 50 which may be part of a cast bodyincluding the depnding skirt 24, earlier described, and those elementsforming the upper end hell of the motor, including a horizontalpartition 51 and a central depending tubular extension 52. Into thelatter is seated and fixedly supported the fixed journal member 33earlier described, the latter serving as a bearing'for the driveextension im. A drain conduit connection shown as extension 54 isprovided, the latter if desired, being externally or otherwise threadedor shouldered.

The fixed reduction structure departs markedly from usual practice ingarbage disposal devices, consisting primarily of a tubular sheet-metalelement which is generally indicated at 60 in Fig. l.- The upper marginof the element 60 is peripherally flanged, the flange 61 projectingoutwardly and horizontally to register with the outermost portionofmember 5'0, which latter is recessed and tapped as at 62 to receivethe screws 46. Thus member 60 is firmly supported by the flange 47 andthe upper marginal. portion of member 50, and may be readily assembledand removed through manipulation of the screws 46. i I

The bottom of the tubularelement. 60 is necessarily open inthe generalarrangement shown, as is also the upper end of the stationary shearingstructure. It is a great preference to construct th Part 60 of a sheetmetal renewal of its cutting edges or in factfor any reason, as

freguently as desired. V

The cylindrical wall of the member 6 0 is provided 5. with a pluralityof horizontal circularrows of lanced or instruck, and hence portedportions, each such portion providing an outlet immediately adjacent thefirst cutting zone, for the reduced, shredded or otherwise comminutedfood particles. As will best appear from Fig. 4 in compar son with Fig.1, each of the lanced-apertured cutting regions includes a port 65 justinwardly of which is a passage of a generally tangential trend,considered relative to the curved periphery of the member 60. Thispassage is defined by the instruck, somewhat convex wall portionsindicated at 66, the innermost edge of each of which is arcuate as willbest appear from Figflfand indicated at 67. The edges 67 as will nowappear, serve as stationary shearing edges in coaction with the undulateperiphery of the vanes 40, it being noted that as indicated by the'arrowin Fig. 4, the direction of movement of the rotor assembly is such as tobring the maerance of the solids, same are positively impelledtangentially outwardly through the passages'defined by the individuallylanced structures 66. An arrangement of three horizontal rows of theformations 65'66 is shown, in which, for better'shredding action, theseveral formations in the rows are in vertically staggered relation. A'very important advantage exists in so arranging'the formations 6566,that not more than one thereof is traversed at a given time by themargins of the blade s' '40 Such an arrangement minimizespeakpower-requirements as well as any clogging or jamming tendencies.Referring now to the structure which distinguishes 'th minormodification of Fig. 6, all elementsof the modified form which are ormay be identical with the corresponding parts heretofore described inreference to Fig. 1, are given the corresponding reference characters toeach of which is added the sufiix letter A. The manner of support of thestructure of Fig. 6, the steps of assembly and connection, and thereducing operation, are or may be all identical withthose features ofFig. 1. The rotary structure, the casting about the lowerpart of thebowl and the upper portions of the motor maybe considered identical inFigs. 1 and 6. A marked distinction is, how- The supporting attachmentof the ring 47A is identical with the mode of assembly of flange 47 ofFig. 1. Since the member 70 is of tubular sheet material throughout, thedrawbolt clamps 20A are provided each with its own base 73 attached asby rivets 74 to the upper periphery of the tubular element.

The structure thus far described offers important advantages ininstallation, since most if not all domestic garbage reduction devicesare desirably mounted in dependent relation to the drain opening of akitchen sink. Particularly ,in enclosed sink arrangements, littleworking roomis available, and installation must be done a't Inthemodification, the strucupwardly to estimated height, the jack screws 17being retracted. The upper hook ends 23 of the clamps 20 are nextinserted into the channel 13 with the clamp linkage in extendedrelation. It will be noted that the unit,

,minus motor M, may, for preparation of drain connection and the like,be rotated about a vertical axis, since by preference the channel 13 isfully annular, thus facilitating the location of the drain connection 54both as to height and to alignment with the drain conduit. During thispreliminary installation period the weight of the unit is carriedentirely by the tail piece and ring 12, the clamps 20 relieving theworkman entirely, of the weight. When ready to complete the connectionbetween the drain conduit and connection 54, the drawbolts throughactuation of the handles 21 are pulled up tightly, the drain connectioncompleted, the jack screws 17 having earlier been rotated into clampingrelation with thering thereabove, thus positively sealing in place thetail piece assembly and support ring. There now remains only theattachment'of the motor M through screws 31, so that the motor may beentirely separately handled. The facilities described, particularly'theprovision for complete detachment and reassembly of the motor and thepossibility of easy adjustment of the unit about a vertical axis throughthe drawbolt clamps 20, serve materially to reduce" the present highcost of installation of garbage reducing devices of dependent,sink-mounted type.

Although the opena-tion of the shredding (and displacement portions ofthe unit are thought to have become fully apparent from the earlierdescription of parts, it may be noted for completeness that with refuseintroduced to the bowl together with .a good volume of water through thedrain outlet DO and the tail piece, energization of motor M will resultin :a relatively high speed rota-tion of the vanes 40. The presence of aplenary volume of liquid with the particles of food waste will, undercentrifugal action, cause the solid particles to be brought outwardlyinto the reduction zone due to the positive displacement efiect of thevanes. The centrifugal action will cause the solids to pile up near theouter edges of the vanes, whereupon same will coact with the stationarycutting edges 67 on the dimpled or lanced portions 66, with a rapid andeffective shredding of the solids in the slurry. A moderate pressure isbuilt up in these cutting zones, under which the now partly re ducedparticles are driven outwardly through the tangential passages, andareextended outwardly of the ports 65. Immediately upon being thusforced through the ports, the solids entrained in the slurry aresubjected to a a further reducing or shredding action by reason of theshearing 'eflt'ect between the inner edges of the blades 44 and themargins of the metal bounding the ports 65. This second stage ofshredding is immediately followed by displacement of the now furthercomminuted waste, outwa'ndly -of the Wheel 42 under the positivecentrifugal action of the blades 44. The latter will virtually sweep theinterior of the chamber within member '50, forcibly delivering thesolids and liquid as a slurry through the drain connection'54, thence tothe final drain conduit.

lt has been found advantageous to provide a vertical rib or projection75 just beyond the port of discharge into the fitting 54. Thise'lementhas a minimal cleararms length from beneath the 'unit or otherwise underdisadvantageous conditions. Earlier and prevalent devices of this orderpresent extreme difiiculty due to great The subject assembly goes fartoward obviating in- V stallation difiiculties of the type noted, due tothe facilities now to be describedz The motor M may, through piece .10installed in the sink, the ring 12 is threaded 'fweight, and thenecessity that'they' be completely as sembled prior to work on the sinkand drain connections.

ance with the outer edges of vanes 44, and acts 'appreciably to clearthe vanes was same are rotated. This provision materially reduces loadon the motor under many conditions since it acts to clear the vanes eachrevol ut'ion thereof. V V

The low cost and ease of replacement of the stationary shearingportionsof-the assembly are of great portance in maintenance of its operatingefficiency, althoughsuch replacement is by. no meanssfrequentlyrequiredlin ordinary domestic usage. It is a preference to provide aneasily accessible threaded connection .be-

tween the drain 54 andlthe drain conduit. Upon breaking this connection,the structure of Fig.1 may be readily 7 dropped merely by release of thedrawbolt clamps 20. Removal of screws 46 will enable the member 60 to belifted out, with ready substitution of a replacement shredding elementin this zone. After insertion of the new lanced tubular unit 60 withreplacement of the screws 46, followed by reappl-ication of the motor ifpreviously removed, clamping the drawbolts 20 and reestablishing thedrain connection, the unit will again operate for many months time atfull initial efficiency.

In the modified form of Fig. 6, release of the clamps 20A and removal ofscrews 46A, will permit removal of member 70 and replacement thereof.The tubular housing structure of this type will beprovided with clamps20A and ring 47A attached thereto at the time of production.

In the. case of the use of replaceable-type vane elements 4,0 interiorlyof the reduction zone, the vanes may be readily replaced upon exposingthe impeller, by end- -wise withdrawing the vanes 40 as is permitted bythe mortise connections 41, followed by insertion of new vanes byedgewise radial application. Due to the ease of assembly and disassemblyof the unit and, when desired, the removal thereof from the sink, suchreplacement of wearing parts can ordinarily be done at a cost of a fewdollars by any one possessed of only moderate skill, without therequirement of high priced labor therefor.

It will now have appeared that the arrangements described will servefully to realize the several objectives hereinabove enumerated, as well.as other advantages implied and stated. Although the invention has beendescribed by part-icularized reference to a selected embod ment and aminor modification thereof, the detail of description should beunderstood as illustrative, rather than in any limiting sense, numerousvariants being possible within the scope of the claims hereuntoappended.

'I claim as my invention: l i

1. In a shredder device for food refuse, :a rotary shredder elementmounted for operation about a vertical axis, a housing for and coactingwith the shredder element, the housing being of a vertically elongateproportion, and adapted to be mounted below the drain opening of a sinkor the ike, a motor supported by the housing, a drive connection ofslidably interfitting type, between the motor and the shredder element,a plurality of quickacting clamps adapted to support the device irom asink or the like above the shredder elementa support r tatab'lythreadedly connectible to a sink tail piece vor the like, said supportbeing provided withclamp engageable seats, the clamps being arranged toengage said clamp seats for temporary support of the device incident tocompletioniot' connections thereto, clamp screws threadedly engageablewith the said support, said clamp screws being vertically adjustablerelative to said support, means located about said tail piece above thesupport, saidolamp screws being adapted to abut said means to securesaid support against rotation, said support being provided with a lowerannular channel, said channel being adapted to receive the upperperiphery of said housing insealing relation upon closing of saidquick'acting clamps, and connections through which the motor issupported :8 of the housing, each said connector. including 'aninturnedock elem n th 9K ele e ac a ly gaging the upper annular channel in thesupponting ring, "said supporting ring being provided with a lowerannula-r channel, said lower annular channel being adapted to receive insealing relation the upper periphery of said housing, a rotary shredderoperable about a vertical axis within the housing, a drain fittingextended laterally of t-he'lowerportion of the housing, the supportingring and screw means realizing vertical alignment of said drain fitting,a motor below the housing, a spline type drive connection between themotor and the rotor and supporting screws engaging the motor and thehousing and so arranged that the motor may be assembled to and removed.{from the housing without disturbing the supporting connection of thehousing to the sink, as provided by said drawbolt c nn ctors;

"3; In a sh-redder;-assembly for the reduction of food refuse or the.like, a substantially cylindrical stationary shear structurecomprised ofa tubular body of sheet metal, and provided in a shredding regionthereof, with a plurality'of ported shearing tormations, the metal ineach such formation being instruck to provide an inwardly extended,stationary shear edge, a irotor within said shredding region andprovided with an 'angularly spaced series lof garms, the arms of therotor operating in an anon-ate path inclose wiping relation to the innersurface of the ported shearing structure thereabout, said arms beingcharacterized by recesses traversing, and coacting in shearing andwiping relation with the said stationary edges, the ported shearingformations being arranged in s eparate and distinct rows, theform-ationsof each row being staggered wtih respect to the formations ,of adjacentrows so that the arm will operatively engage only one formation at atime, power means for driving the rotor, and connections for supply to,and drainage and detachably connectible to the housing independently ofthe connection of the housing to the tail piece orthe like of theassociated sink.

2. In a garbage shredder of vertical shaft, sink-supthe sink or the likeabove and supplying the shredder, a supporting ring externally andthreaded-1y engaging a tail piece of the associated sink, a clamp-screwmeans vertically adjustable with respect to the ring for seiectivelysecuring-same against rotation'with respect to the vported type, anassembly including, forengagement with adjacent tail piece,the-supporting ring being provided with an upperv annular channel, avertically elongate from the shear structure.

4. In a garbage shredder of wet-reduction type, a lix'ed, tubular outershearing element, a rotary inner shredding element, 'the outer elementconsisting of a tubular section of sheet metal provided with a pluralityof instruck lanced portions each providing a stationary shear edgeappreciably inwardly of the normal inner periphery of the tubular sheetmetal element, the latter being provided with adiseha-rge port in theimmediate region of each such lanced portion, the rot-ary'inner elementserving as a combined centrifugal and shearing impeller characterized byspaced impeller vanes each having an outermost mar,- .gin formed toconstitute a movable shear structure, the shearing edges of said vanesbeing characterized by marginal recesses operable adjacent to and inwiping and shearing relation with the said fixedshear edges, the edgebetween said marginal recesses'being adapted to override closely and towipe the remaining portion of the tubular shearing elementintermediate-said lanced portions, power driving means for saidimpeller, and means providing inlet and out-let connect-ions to and fromthe fixed shearing element for conducting liquid and solids.

5. In a garbage shredder for engagement with a sink, an assemblyincluding a vertically chambered housing, a rotary shredderope-rableabout a vertical axis within the fhOUSlIlgyii; drain fittingextended laterally of the lower portion of the housing, ,a motor belowthe housing, a housing extension projected below said housing, a journalsleeve disposed in said extension, "said sleeve including an annularridge that projects into said housing, the rotary shredder including adriving extension received internally or said sleeve, said drivingextension being provided :with ga fiat head portion that rotatably seatson said annular ridge, and a flat plate secured to said head portionythehead portion and plate constituting a flat bottom for said rotaryshredder, and a drive connection L'of': slidably interfittingtypebetween :the motora-nd the driving extension, --whereby sealingrelation between the head portion and the annular ridge will remainiettective,

and the sink wiil remain'serviceable through said drain, upon slidabl-edetachment of said motor.

6. The combination and arrangement of elements as recited by claim 5,but further characterized in that the driving connection between themotor and driving extension include a shaft connected to said motor, asplined formation internally of said driving extension, and'a conformingsplined formation on theshaft of said motor,

the cooperating splined formations being arranged such that the shaft ofthe motor is precluded .from extension into said housing. a V r 7. In agarbage shredder for engagement with a sink,

an assembly including a chambered housing, a rotary shredder operableabout a vertical axis within-the housing, a drain fitting extendinglaterally of said housing, a motor below the housing, a tubular housingextension 7 projecting below said housing, a journalsleeve disposed insaid. extension, the rotary shredder including a driving extensionreceived internally'of said sleeve, and including :a plate portioncarried by said driving extension, said "plate portion constituting abottom for said'rota-ry;

shredder, said rotary shredder having a portion-that seats on the rim ofsaid sleeve toprovide an effective seal between the rotary shredder andsleeve, the driving extension having a socket open onlyat the lower end,and a drive connection of slidably interfitting type between the motorand the socket of said driving extension, whereby sealing relationbetween the rotary shredder" and the T sleeve will remain reflective,and the sink will remain serviceable through said drain, upon slidabledetachment of said motor.

8. In a garbage shredder device for engagement with a sink, an assemblyincluding a chambered housing, a

rota-ry shredder operable about a vertical axis the housing, a motorconnected to said housing, a housing wall below said rotary shredder,said housing wall including a tubular extension orojecting below saidhousing, the rotary shredder including a driving extension receivedinternally of said tubular extension, the driving extension and hencethe rotary shredder being rotatably mounted in said tubular extension,abea-ring element located around said driving extension, said drivingextension being provided with a plate portion that is rotatively seatedon said bearing element to provide an effective seal between theshredder and housing wall, Iandra drive connection of 'slidablyinterfitting type between the motor and the driving extension so as tomaintain the seal and the rotative mountingybetween the drive extensionand said tubular extension upon slida'ble detachment of said motor.

References Cited in the tile of this patent -UNITED STATES PATENTSFrance July 31, 1926

